Handsaw.



J. WOOD.

HANDSAW.

APPLICATION IILED DBO.1, 1911.

1,040,832. Patented 0013.8,1912.

f l l I l \N I \I am *8 v COLUMBIA ILANOURAPH to. WASHINGTON, n. C

UE SATES PATENT @FFICE.

JOSEPH WOOD, 0F EVERETT, MASSACHUSETTS.

HANDSAW.

To all whom it may concern:

Be it known that I, Josnrn 001), a citizen of the United States, and aresident of Everett, in the county of Middlesex and State ofMassachusetts, have invented certain new and useful Improvements in Handsaws, of which the following is a specification.

This invention relates chiefly tohand saws employed by butchers forcutting meat, and it has for its object to provide improved means fordetachably connecting the frame and blade of the saw, the said meansbeing adapted to prevent the blade from rattling when in use.

The invention consists in the improvements which I will now proceed todescribe and claim.

Of the accompanying drawings which form a part of thisspecification,Figure 1 represents a side View of a saw embodying myinvention, parts of the frame and blade being broken away; Fig. 2represents a section on line 22 of Fig. 1; Fig. 3 represents a sectionon line 3-3 of Fig. 1; Fig. 4 represents a section on line 41-4L of Fig.1; Fig. 5 represents a section on line 55 of Fig. 1.

Similar reference characters indicate the same or similar parts in allthe figures.

In the drawings,--12 represents the back of the saw frame on which areformed an inner arm 13 and an outer arm 14, said back and arms beingintegral with each other and the frame formed thereby being resilient sothat the arms may be forced slightly inward toward each other, and whenso forced have a tendency to spring apart. The inner arm 18 is longerthan the outer arm and has a blade-receiving slot 15 (Fig. 2) and aninner blade-engaging stud 16 extending through said slot. To the outerend portion of the outer arm 14 is fulcrumed or pivoted at 17 a leverhaving a shorter arm 18 projecting below the fulcrum 17 and below theouter end of the outer arm, and a longer arm 18 projecting above thefulcrum, the lever being provided with an ear 18 entering a slot in thearm 14 and receiving the fulcrum 17. The shorter arm 18 is provided witha blade-receiving slot 19 (Fig. 3) and with an outer bladeengaging stud20 extending through said slot.

Specification of Letters Patent.

Application filed December 1, 1911.

Patented Oct. 8, 1912.

Serial No. 663,334.

21 represents the saw blade, which is provided in the outer end portionsof its back with oppositely inclined notches 21, 21.

22 represents a movable detent or latch which, as here shown, is aU-shaped metal strip formed to bestride the lever arm 18 and outer framearm 14, the ends of said strip being connected by a pivot 23 with theinner portion of the frame arm. Vhen the detent is moved to the positionshown by full lines, Fig. 1, it holds the lever arm 18 against the framearm 141-, and thus holds the outer stud 20 at its maximum separationfrom the inner stud 16, so that said studs are caused to press inopposite directions on the inner ends of the blade notches 21 and lockthe blade in its operative position. lVhen the detent is moved to theposition shown by dotted lines, itpermits the outer stud 20 to movetoward the inner stud 16 and thus unlock or release the blade and permitits removal.

In applying the blade to the frame, the inner notch 21 is first appliedto the inner stud 16, and, the lever being free, the outer end of theblade is swung upwardly until its outer notch 21 receives the outer stud20. The longer arm of the lever is then forced inwardly against theframe arm 14 and secured by the detent 22, this operation moving thestud 20 away from the stud 16, and springing the arms 13 and 1 1-slightly toward each other. The superior length of the lever arm 18enables the muscular force of the operator to be exerted advantageouslyin moving the lever to secure the blade. The lever arm 18" is providedwith a slight protuberance 18 which engages the detent 22 suilicientlyto prevent accidental displacement thereof from the position shown byfull lines. The pull exerted by the strained blade 21 tends to hold thesaid protuberance in engagement with the de tent, the lever arm 18 beingadapted to be pressed inwardly toward the frame arm 14: by the operator,suflicieutly to permit the upward displacement of the detent. The slots15 and 19 in the lever arm 18 and frame arm 13 are preferably arrangedobliquely, as shown by Fig. 5, so that portions of the blade inserted insaid slots are deflected from the plane of the main portion of the bladeand hear so forcibly against opposite sides of the slots that chatteringflect the portions of the blade inserted or rattling of the blade isprevented. I V therein. 10 l I claim: In testimony whereof I haveaflixed my A saw frame, having slotted arms adaptsignature, in presenceof tWo Witnesses. 5 ed to receive the end portions of a saw JOSEPH WOOD.

blade, and means for engaging and strain- Witnesses: ing the blade, theblade-receiving slots be- C. F. BROWN, ing obliquely arranged andadapted tbde- P. W. PEZZETTI.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents. Washington, D. C.

